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YUL - STL

Find cheap flights from Montreal to St. Louis from $253

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Montreal to St. Louis departing on 6/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Mon 6/3
Mon 6/10

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Montreal to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 43,693,958 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Montreal to St. Louis (YUL-STL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Montreal to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:00 am - 7:22 amYUL-STL
25h 22m2 stops
3:23 pm - 3:00 pmSTL-YUL
22h 37m1 stop
Tue, Jun 4 - Tue, Jun 11
6:50 am - 9:39 amYUL-STL
27h 49m1 stop
6:22 pm - 3:00 pmSTL-YUL
19h 38m1 stop
Mon, Jun 3 - Thu, Jun 6
6:35 pm - 4:36 pmYUL-STL
23h 01m2 stops
5:25 pm - 11:55 pmSTL-YUL
5h 30m1 stop
$434Delta
Find Deal
Fri, May 31 - Fri, Jun 7
6:10 am - 2:19 pmYUL-STL
9h 09m1 stop
3:23 pm - 11:10 pmSTL-YUL
6h 47m1 stop
$435Delta
Find Deal
Tue, Jun 4 - Tue, Jun 11
7:30 pm - 9:05 pmYUL-STL
2h 35mnonstop
8:25 am - 2:36 pmSTL-YUL
5h 11m1 stop
$473United Airlines
Find Deal
Fri, Aug 16 - Wed, Aug 21
5:40 pm - 10:31 pmYUL-STL
5h 51m1 stop
8:05 am - 6:42 pmSTL-YUL
9h 37m2 stops
$479United Airlines
Find Deal
Fri, Aug 16 - Wed, Aug 21
7:30 pm - 9:05 pmYUL-STL
2h 35mnonstop
12:00 pm - 3:23 pmSTL-YUL
2h 23mnonstop
$515Air Canada
Find Deal
Fri, Aug 16 - Wed, Aug 21
6:15 am - 12:17 pmYUL-STL
7h 02m1 stop
12:00 pm - 3:23 pmSTL-YUL
2h 23mnonstop
$518Air Canada
Find Deal
Thu, Jul 4 - Sun, Jul 21
10:40 am - 7:30 pmYUL-STL
9h 50m2 stops
6:08 pm - 11:55 amSTL-YUL
16h 47m1 stop
$565American Airlines
Find Deal
Fri, May 31 - Fri, Jun 7
5:29 pm - 11:10 amYUL-STL
18h 41m2 stops
3:27 pm - 1:45 pmSTL-YUL
21h 18m1 stop
$621American Airlines
Find Deal
Mon, Jun 3 - Thu, Jun 6

Flights from Montreal to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Montreal to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Montreal to St. Louis?

The average price of all flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to St. Louis on a Tuesday and more expensive on a Sunday. On your return trip to Montreal, you should consider flying back on a Tuesday, and avoid Thursdays for better deals.

What is the cheapest month to fly from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis is January, where tickets cost $385 on average. On the other hand, the most expensive months are July and August, where the average cost of tickets is $625 and $596 respectively.

How far in advance should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis, you should book around 5 days before departure. For the absolute cheapest price, our data suggests you should book 74 days before departure.

Which airlines provide the cheapest flights from Montreal to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, Delta offered the best one-way deal for that route, at $253. KAYAK users also found Montreal to St. Louis round-trip flights on Delta from $434 and on United Airlines from $473.

Which airlines fly non-stop between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis.
There is just one airline that flies from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis direct and that is Air Canada. The best one-way deal found from Air Canada for the route is $365.

How many flights are there between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis per day?

There is a maximum of 1 nonstop flight a day that takes off from Montreal Pierre Elliott Trudeau Intl Airport and lands in St. Louis, with an average flight time of 2h 35m. The most common departure time is 7:00 pm and most flights take off in the evening. Each week, there are 7 flights.

Which cabin class options are there for flights between Montreal Pierre Elliott Trudeau Intl Airport and St. Louis?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Montreal to St. Louis take?

The duration of a nonstop flight to St. Louis from Montreal is typically 2h 35m. The journey crosses a distance of 967 miles.

What’s the earliest departure time from Montreal to St. Louis?

Early birds can take the earliest flight from Montreal Pierre Elliott Trudeau Intl Airport at 7:30 pm and will be landing in St. Louis at 9:05 pm.

What’s the latest departure time from Montreal to St. Louis?

If you prefer to fly at night, the latest flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis jets off at 7:30 pm and lands at 9:05 pm.

Good to know

Low season

January

High season

October

Cheapest flight

$253
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Montreal to St. Louis

When to book flights from Montreal to St. Louis

Are your dates flexible? Find out the best times to travel from Montreal to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Montreal to St. Louis flights

  • What is the cheapest flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis?

    In the last 3 days, the lowest price for a flight from Montreal Pierre Elliott Trudeau Intl Airport to St. Louis was $253 for a one-way ticket and $332 for a round-trip.

  • Do I need a passport to fly between Montreal and St. Louis?

    Yes

  • Which airlines offer Wi-Fi service onboard planes from Montreal to St. Louis?

    Only Air Canada offers inflight Wi-Fi service on the Montreal to St. Louis flight route.

  • Which aircraft models fly most regularly from Montreal to St. Louis?

    The Canadair (Bombardier) Regional Jet 900 is the aircraft model that flies most regularly on the Montreal to St. Louis flight route.

  • Which airline alliances offer flights from Montreal to St. Louis?

    Star Alliance is the only airline alliance operating flights between Montreal and St. Louis.

  • On which days can I fly direct from Montreal to St. Louis?

    There are nonstop flights from Montreal to St. Louis on a daily basis.

  • Which is the best airline for flights from Montreal to St. Louis, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Montreal to St. Louis are Delta and American Airlines. With an average price for the route of $468 and an overall rating of 8.0, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $471 and an overall rating of 7.3.

  • How does KAYAK find such low prices on flights from Montreal to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Montreal to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Montreal to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Montreal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Montreal to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Montreal with another airline. Booking your flights between Montreal and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Montreal to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Montreal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from Montreal to St. Louis?

Find which airlines fly direct from Pierre Elliott Trudeau Intl to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Montreal Pierre Elliott Trudeau Intl to Lambert-St Louis

Monday

Air Canada, United Airlines

Air Canada, United Airlines

Tuesday

Air Canada, United Airlines

Air Canada, United Airlines

Wednesday

Air Canada, United Airlines

Air Canada, United Airlines

Thursday

Air Canada, United Airlines

Air Canada, United Airlines

Friday

Air Canada, United Airlines

Air Canada, United Airlines

Saturday

Air Canada, United Airlines

Air Canada, United Airlines

Sunday

Air Canada, United Airlines

Air Canada, United Airlines

See more direct flights

Nonstop returns

Lambert-St Louis to Montreal Pierre Elliott Trudeau Intl

Monday

Air Canada, United Airlines

Air Canada, United Airlines

Tuesday

Air Canada, United Airlines

Air Canada, United Airlines

Wednesday

Air Canada, United Airlines

Air Canada, United Airlines

Thursday

Air Canada, United Airlines

Air Canada, United Airlines

Friday

Air Canada, United Airlines

Air Canada, United Airlines

Saturday

Air Canada, United Airlines

Air Canada, United Airlines

Sunday

Air Canada, United Airlines

Air Canada, United Airlines

See more direct flights
See more direct flights

Top 3 airlines serving from Montreal to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Montreal to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Montreal to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10848 reviews
8.6Crew
8.0Entertainment
8.2Boarding
7.4Food
7.9Comfort
Airline reviews

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

10.0 ExcellentAllan, May 2024SUN - SLC
Read more about Delta reviews

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

The crew were very welcoming and helpful. I just wish economy had a bit more leg room. My knees were constantly hitting the chair in front of me.

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

I liked the piloting of the aircraft. Very disappointed about lack of electrical ports. Also, although a short flight. there was enough time to hand out snacks to comfort + seats as was done for first class.

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Delta is one of the best airlines I have flown

All four American Airlines flights I took in last seven days were delayed. Caused me loads of problems, missed meetings, loss of time and money.

American cancelled our flight home. Zero option for hotel, alternative transportation and took 3 hours to find our bags so we could take a 3 hour UBER ride home on our dime. Never flying AA again.

They gave my seat away although it was a connecting flight with them and the flight was a bit delayed.

They ocer booked the connecting flight. My bags took a long time to come out, nevertheless I got to the gate in time to board, but they have given my seat to another passenger. They were aware I was connecting from another flight that was a little late, but they did not care. The customer representatives were rude. A horrible experience.

Flight was cancelled had to move to another gate late again no internet paid for the month and never can use it waste of money

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

WiFi connected but only let you go to the AA website, not even text messaging worked.

Too bad that first class seats do not recline significantly causing discomfort

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

Flight was delayed, I had to put my luggage all the way in the back! They served only a beverage no snack on the way in Air Canada, definitely not a good first impression.

When we got to the airport for our flight from Chicago to Montreal which was scheduled for 2.00 p.m. they had no record of it and booked us on a flight at 3.30 very disappointing . We also had to pay 50.00 each for a seat. All things considered ,I will never book thru Kayak again. Next time I will only book directly thru Air Canada no second party booking Sue

My flight has been canceled and I had to cancel entire trip.

No food for a 6 hours flight! Plus very expensive to buy ! Sit uncomfortable! Awful!!!

There was no food on this flight. We had less than 1/3 full plane and were not allowed to spread out. Staff gave the story of the plane had to have all of us up front for 'balance.' Total bs.

There were changes to my flight with many email and very difficult to keep up with details of changes. I consulted Air Canada website that said I was to depart Casablanca at 9:35 but when I got to airport that take off time was delayed by 2 hours. That's 2 hours at an airport instead of bed. I don't understand why Air Canada website didn't show the change in take off like they showed the change in transfer. Do better.

I was delayed from Montreal to Tokyo for 3 hours and they didn't compensate anything

Flying Business on Air Canada is wonderful. With ultimate destination in US, you get the Lounge. Only problem is there was no lounge in YQB so it had to wait until connector in YUL. Flight itself is only about 30 min like the old DC-NYC shuttle so there was no service other than almonds and the bottle of water that was at your seat upon boarding. Would have been nice to be offered a beverage and there was enough time to do a quick pass for the 16 seats. That and having a lounge in YQB are only complaints, but that's very first world complaint. The FA were cordial and professional if not warm. It was a good flight and I'd do it again. But, word to the wise, it's a very different experience doing border check in YUL than YYZ. Long walk and had to go through full screening (including taking off shoes and having to chuck the bottle I had just gotten not knowing there was going to be a frull screening since there was no warning) at YUL even though never left the terminal after landing. YYZ was just a passport check. This is not A/C's fault, but travelers should be advised/warned in advance so they know what to expect especially since you land and have access tot eh terminal and it's stores and food before you get to border check. If you have mobility issues, the distance can easily be a problem and there is no warning of how long it is until you have reached the end. My mom would not be able to navigate it and someone like her may not be able to stop in the middle of an empty long corridor to ask for mobility help. A sign offering how long (10 Min, etc.) the walk is like at new LGA terminals goes a long way. Also can be stressful if you're tight on time for a connection.

I’m 5’3 115 lbs and felt so cramped in this express jet. My carry on actually meets the requirements and still had to be stuffed Into the overhead and barely fit down the aisle. Not a great experience. Air Canada needs to replace these planes.

I liked that the flight was on time for departure and arrival

Book cheap flights from Montreal to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Montreal to St. Louis found on KAYAK in the last 72 hours.
6/21Fri
1 stopDelta
8h 30mYUL-STL
$253
7/15Mon
1 stopSun Country Air
25h 39mYUL-STL
$256
7/16Tue
1 stopAir Canada
6h 11mYUL-STL
$263
6/20Thu
1 stopAir Canada
7h 11mYUL-STL
$264
7/20Sat
1 stopUnited Airlines
5h 15mYUL-STL
$268
8/7Wed
2 stopsUnited Airlines
8h 10mYUL-STL
$277
6/22Sat
1 stopAmerican Airlines
16h 17mYUL-STL
$279
7/19Fri
1 stopAmerican Airlines
17h 25mYUL-STL
$281
7/15Mon
2 stopsWestJet
15h 31mYUL-STL
$301
7/14Sun
2 stopsWestJet
20h 05mYUL-STL
$323

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Last minute flights from Montreal to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Montreal to St. Louis that are departing in the next 10 days.
5/7Tue
multi-stopWestJet
15h 19mYUL-STL
5/8Wed
multi-stopWestJet
10h 06mSTL-YUL
$638
5/7Tue
nonstopUnited Airlines
2h 35mYUL-STL
5/8Wed
multi-stopUnited Airlines
5h 10mSTL-YUL
$639
5/7Tue
multi-stopWestJet
20h 21mYUL-STL
5/8Wed
multi-stopWestJet
10h 06mSTL-YUL
$658
5/7Tue
nonstopAir Canada
2h 35mYUL-STL
5/8Wed
multi-stopAir Canada
6h 10mSTL-YUL
$680

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Montreal - St. Louis Flights

Departure:

Montreal (YUL)Canada

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Montreal

Cabin classes:

$450
$602